BROAN offers the widest variety of ventilation fans in the industry. For the latest high-performance, ENERGY STAR® Certified solution to today’s green building requirements, or ultra quiet operation for a comfortable environment, BROAN offers stylish options to fit any situation from a retrofit to a new build out. As the leader in residential ventilation, we will confidently meet your needs.

As the industry's leader in providing Fresh Air Systems for residential construction, BROAN sets the bar in standards of innovation and excellence. We are continually seeking ways to provide the best quality, technology, style and care to our customers.

Air in your attic can reach 150°F during the summer, warming your home, increasing the load on your air conditioner, and adding to your energy bill. In winter, ice dams can result from poor ventilation, and moist air in the home can condense on attic surfaces causing mildew, rotting wood and wet insulation. BROAN has the solution!

It’s quite simple. You may use some rooms only briefly, such as the bathroom, as you get ready for work in the morning. Heating the entire home for this purpose is pointless. Instead, opt for spot heating, which will effectively heat the area you need – when you need it.

Providing make-up air for exhaust devices is easy, controlling it is not – until now. BROAN® Directwire Make-Up Air Dampers, when interlocked with slave dampers, open in unison to provide synchronized operation for kitchen, bath and whole house ventilation products. The MD6T is wired to the transformer, using low voltage wiring, which signals the damper to open and close while the range hood is in operation. The intelligent design options ensure optimum performance in a variety of installations and applications.

Interlocked make-up air dampers provide make-up air when called for to keep the home comfortable by allowing the range hood to operate at optimum levels

Slave dampers (MD6S or MD8S) are interlocked to the main automatic or universal make-up air damper and open in unison for synchronized operation. They close, along with the main damper, as soon as the range hood is powered off. Slave dampers can be “ganged” together to provide a cost effective means to provide for higher volumes of make-up air

Interlocked make-up air systems avoid wasted energy associated with barometric solutions and do not let unwanted air into the home during heating or cooling activities so air pressure is equalized for a well-balanced environment

Code compliant make-up air solutions for domestic range hoods in family dwelling units

To help you determine your customers’ make-up air needs, Broan-NuTone has developed this on-line tool.With our Make-Up Air Specifier you can be confident that the products you choose will meet the latest codes and regulations and satisfy the home’s needs.Use this tool to make your specification job easier.

Let’s get started by selecting the state where the dwelling unit will be located.CLICK HERE

643FA

MD8T is rated
5.0 out of
5 by
2.

Rated 5 out of
5 by
cruzin023 from
8" Broan DamperBought this to be installed in the outside (makeup) air duct of our new home. We have a large range hood that required this damper be directly wired to the hood when turned on. Haven't moved in yet to try it but the product arrived quickly and seemingly in good condition.

Date published: 2016-10-31

Rated 5 out of
5 by
jtkell from
A great solutionMass Building Code requires makeup air on Hoods greater than 400 cfm...I used the Broan damper with a pressure switch (you can purchase this combo) to operate the damper and it works fantastic. You simply place the pressure probe in your hood exhaust vent, the switch which is normally open, closes and completes the circuit to operate the damper. I will be using this on all my houses.

Can this product be used as a zone for a utility room using a light switch for open/close of damper?

Asked by: frankg

Thank you for your question on the model MD8T automatic make-up air damper. This device is only designed to be used with compatible Broan exhaust fans or compatible Best or Broan range hoods.

Answered by: BroanCustomerService

Date published: 2013-10-23

What size register should be used with this damper and what size outlet do i need

range is E6060

Asked by: chris

Thank you for your question on the model MD8T make up air damper. The MD8T is designed to attach to 8&rdquo; duct work. Please contact the Technical Service Department at 800-637-1453 for assistance.

Answered by: BroanCustomerService

Date published: 2014-11-10

Compatible with RMIP45

Is this damper compatible to be direct wired with a Broan RMIP45?

Asked by: Steve

Thank you for your question on the Broan RMIP45. The MD8TU universal damper would be the choice of damper for the RMIP45. If you have further questions please contact our Technical Support directly at 800-637-1453.

Answered by: BroanTechnicalSupport1

Date published: 2017-03-27

What is the maximum volume of air that this unit will allow without an assist fan?

Asked by: Ron

Thank you for your question on the model MD8T make up air damper. Please contact the Technical Service Department at 800-637-1453 for assistance.